This is the motion one would make on their beer bottle after one has been bottle tapped. Preferably motioning from ones crotch and shaking the beer on the person who performed the tap. Making the money shot on them the ultimate rebuttal for douche baggery.

Martha just got out of prison and decided to bottle tap my freshly opened Corona. As my beer started to erupt, I poised, place the bottle close to my crotch, aimed, and stroked my bottle as it gushed all over her clothes and face. A classic beer jerk off performed flawlessly.